<accordion>
  <accordion-group heading="Group without isOpenChange event listener">
    <p>Some content</p>
  </accordion-group>
  <accordion-group heading="Group with isOpenChange event listener" (isOpenChange)="log($event)">
    <p>Some content</p>
  </accordion-group>
  <accordion-group heading="Group with isOpenChange event listener" (isOpenChange)="log($event)">
    <p>Some content</p>
  </accordion-group>
</accordion>
